1.
Write an inequality for the sentence
three times a number is less than 45
.
A.
3
x
45
B.
3
x
> 45
C.
3 +
x
< 45
D.
3
x
< 45
Hint
2.
Solve 3
r
+ 5 > 26.
A.
B.
C.
r
> 7
D.
r
> 21
Hint
3.
Use elimination to solve the system of equations.
-
x
+ 2
y
= 18
x
+ 8
y
= -38
A.
B.
(-5, -1)
C.
(-22, -2)
D.
Hint
4.
The sum of two numbers is 36. Twice the first number minus the second is 6. Find the numbers.
A.
(42, 6)
B.
(30, 6)
C.
(14, 22)
D.
(10, 26)
Hint
5.
Find a solution to the equation using backtracking.
A.
a
= 3
B.
a
= –2
C.
a
= 2
D.
a
= 5
Hint
6.
Find a solution to the equation by doing the same thing to both sides.
8
p
+ 14 = 2
p
– 22
A.
p
= 1
B.
p
= 6
C.
p
= –6
D.
p
= –1
Hint
7.
How could you use the graph of
h
= 20
t
– 6
t
2
to estimate the solution(s) of 20
t
– 6
t
2
= 7, where
h
stands for height and
t
stands for time?
A.
Draw a horizontal line at
h
= 20 and find where it intersects the curve.
B.
Draw a vertical line at
t
= 20 and find where it intersects the curve.
C.
Draw a horizontal line at
h
= 7 and find where it intersects the curve.
D.
Draw a vertical line at
t
= 7 and find where it intersects the curve.
Hint
8.
A ball is launched straight up from ground level modeling the equation
h
= 52
t
– 10
t
2, where
h
stands for height in meters and
t
stands for time. What is the approximate value of
t
when the ball hits the ground?
A.
6.0 seconds
B.
5.2 seconds
C.
2.6 seconds
D.
0 seconds
Hint